Herbs, up to 1 m. The roots are thick and fat, inverted conical, black or dark brown. Stems erect, cylindrical, multi-branched, glabrous or sparsely puberulent, with slightly enlarged nodes. Leaf blade ovate or ovate-triangular, entire, glabrous on both surfaces, veined. Flowers are always branched, involucre is bell-shaped, about 65438±0cm long, 5-lobed, and lobes triangular and ovate; Perianth is purplish red, yellow, white or variegated, high-legged, disc-shaped, tube length 2-6 cm, eaves diameter 2.5-3 cm, 5-lobed; Flowering in the afternoon, fragrant, withered before noon the next day. Achenes are spherical, 5-8 mm in diameter, leathery and black, with wrinkles on the surface; The endosperm of seeds is powdery. The flowering period is June -65438+ 10, and the fruiting period is August-165438+ 10.

Native to tropical America. China is often cultivated in the north and south for ornamental flowers, and sometimes it is wild. Roots and leaves can be used as medicine, and have the functions of clearing away heat and toxic materials, promoting blood circulation, regulating menstruation and nourishing. Seed white powder can remove facial moles and acne.